Replacing URLs

replaceurl.php

<?php

/**
 * Replacing URLs
 * @param: string.
 * @return: string.
 */
function ParseURL($str) {
    return preg_replace([
        "/(?<=[^\]A-Za-z0-9-=\"'\\/])(https?|ftp|gopher|news|telnet|mms){1}:\/\/([A-Za-z0-9\/\-_+=.~!%@?#%&;:$\\()|]+)/is",
        //"/([\n\s])www\.([a-z0-9\-]+)\.([A-Za-z0-9\/\-_+=.~!%@?#%&;:$\[\]\\()|]+)((?:[^\x7f-\xff,\s]*)?)/is",
        "/([^\/\/])www\.([a-z0-9\-]+)\.([A-Za-z0-9\/\-_+=.~!%@?#%&;:$\[\]\\()|]+)((?:[^\x7f-\xff,\s]*)?)/is",
        "/(?<=[^\]A-Za-z0-9\/\-_.~?=:.])([_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*(\.[a-zA-Z]{2,4}))/si"
    ], [
        "<a href=\"\\1://\\2\" target=\"_blank\">\\1://\\2</a>",
        "\\1<a href=\"http://www.\\2.\\3\\4\">[url]www.\\2.\\3\\4[/url]</a>",
        "<a href=\"mailto:\\0\">\\0</a>"
    ], ' '.$str);
}